Tuna Treasure Chests

You can use French rolls, sub rolls, hard rolls, etc., as long as they're the unsliced kind - best if not too soft and not too hard. Those who like their food more on the spicy side may want to throw something in to heat it up a bit. My mom has been making these for as long as I can remember, so I'm not sure what the original source is, but it's a fantastic and delicious comfort food.